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GeForce GTX 860M vs Radeon HD 3850 X2

Intro

The GeForce GTX 860M has a clock frequency of 797 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It features 1152 SPUs, 96 Texture Address Units, and 16 ROPs.

Compare that to the Radeon HD 3850 X2, which features a clock frequency of 668 MHz and a GDDR3 memory frequency of 828 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 16 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3850 X2 is 66% faster than the GeForce GTX 860M overall, due to its higher bandwidth. (explain)

Radeon HD 3850 X2 105984 MB/sec
GeForce GTX 860M 64000 MB/sec
Difference: 41984 (66%)

Texel Rate

The GeForce GTX 860M should be quite a bit (approximately 258%) more effective at texture filtering than the Radeon HD 3850 X2. (explain)

GeForce GTX 860M 76512 Mtexels/sec
Radeon HD 3850 X2 21376 Mtexels/sec
Difference: 55136 (258%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 3850 X2 is the winner, by a large margin. (explain)

Radeon HD 3850 X2 21376 Mpixels/sec
GeForce GTX 860M 12752 Mpixels/sec
Difference: 8624 (68%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 860M

Amazon.com

Check prices at:

Radeon HD 3850 X2

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 860M Radeon HD 3850 X2
Manufacturer nVidia AMD
Year March 12 2014 Apr 4, 2008
Code Name GM107 RV670 PRO
Memory 4096 MB 512 MB (x2)
Core Speed 797 MHz 668 MHz (x2)
Memory Speed 4000 MHz 1656 MHz (x2)
Power (Max TDP) 45 watts (Unknown) watts
Bandwidth 64000 MB/sec 105984 MB/sec
Texel Rate 76512 Mtexels/sec 21376 Mtexels/sec
Pixel Rate 12752 Mpixels/sec 21376 Mpixels/sec
Unified Shaders 1152 320(64x5) (x2)
Texture Mapping Units 96 16 (x2)
Render Output Units 16 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 128-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTX 860M

Amazon.com

Check prices at:

Radeon HD 3850 X2

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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